<template>
	<view>
		<image class="bgs" src="https://wuyouzhuanapp.oss-cn-beijing.aliyuncs.com/1.png" mode="widthFix"></image>
		<!-- <headers title="设置" /> -->
		<view class="form">
			<view class="item">
				<view class="left">
					清除缓存 <text>{{fileSizeString}}</text>
				</view>
				<view @click="clearCache" class="handle">
					立即清除
				</view>
			</view>
			<view class="item">
				<view class="left">
					版本更新 <text>有新版本 V2.19</text>
				</view>
				<view class="handle">
					立即更新
				</view>
			</view>




		</view>
	</view>
</template>
<script>
	import headers from '@/components/headnavbar/index.vue'
	export default {

		components: {
			headers
		},
		data() {

			return {
				fileSizeString: "0M"
			};
		},
		onLoad() {
			this.formatSize()
		},

		methods: {

			formatSize() {
				let that = this;
				plus.cache.calculate(function(size) {
					let sizeCache = parseInt(size);
					if (sizeCache == 0) {
						that.fileSizeString = "0B";
					} else if (sizeCache < 1024) {
						that.fileSizeString = sizeCache + "B";
					} else if (sizeCache < 1048576) {
						that.fileSizeString = (sizeCache / 1024).toFixed(2) + "KB";
					} else if (sizeCache < 1073741824) {
						that.fileSizeString = (sizeCache / 1048576).toFixed(2) + "MB";
					} else {
						that.fileSizeString = (sizeCache / 1073741824).toFixed(2) + "GB";
					}
				});
			},
			clearCache() {
				let that = this;
				let os = plus.os.name;
				if (os == 'Android') {
					let main = plus.android.runtimeMainActivity();
					let sdRoot = main.getCacheDir();
					let files = plus.android.invoke(sdRoot, "listFiles");
					let len = files.length;
					for (let i = 0; i < len; i++) {
						let filePath = '' + files[i]; // 没有找到合适的方法获取路径，这样写可以转成文件路径  
						plus.io.resolveLocalFileSystemURL(filePath, function(entry) {
							if (entry.isDirectory) {
								entry.removeRecursively(function(entry) { //递归删除其下的所有文件及子目录  
									uni.showToast({
										title: '缓存清理完成',
										duration: 2000
									});
									that.formatSize(); // 重新计算缓存  
								}, function(e) {
									console.log(e.message)
								});
							} else {
								entry.remove();
							}
						}, function(e) {
							console.log('文件路径读取失败')
						});
					}
				} else { // ios  
					plus.cache.clear(function() {
						uni.showToast({
							title: '缓存清理完成',
							duration: 2000
						});
						that.formatSize();
					});
				}
			}
		}
	};
</script>
<style lang="scss" scoped>
	.form {
		.item {
			margin: 32rpx;
			height: 115rpx;
			background: #FFFFFF;
			border-radius: 20rpx 20rpx 20rpx 20rpx;
			opacity: 1;
			display: flex;
			align-items: center;
			justify-content: space-between;
			padding: 0 20rpx;

			.left {
				display: flex;
				align-items: center;
				font-size: 28rpx;
				font-family: PingFang SC-Regular, PingFang SC;
				font-weight: 400;
				color: #333333;
				line-height: 33rpx;

				text {
					color: #999999;
					margin-left: 15rpx;
				}
			}

			.handle {
				font-size: 27rpx;
				font-family: PingFang SC-Regular, PingFang SC;
				font-weight: 400;
				color: #3757FF;
				line-height: 32rpx;
			}
		}
	}
</style>
